The effects of interference between closely packed diffraction orders in the far field are studied for a number of different scalar-domain diffractive optical elements (DOE’s). We demonstrate that there are specific order separations that minimize the observed degradation in the far-field output uniformity. Finally, a DOE that is designed to ensure that the order separation lies near one of these minima is compared with a more general design that produces an equivalent far-field output.
© 1999 Optical Society of America
Andrew J. Waddie and Mohammad R. Taghizadeh, "Interference Effects in Far-Field Diffractive Optical Elements," Appl. Opt. 38, 5915-5919 (1999)